<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!--0:引入 vue.js-->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id = "app">
        <ul>
            <li v-for="(val,i) of teachers" :key="i">
                第{{i+1}}阶段的老师是：{{val}}
            </li>
        </ul>
    </div>

    <script>
        let vm = new Vue({
            el:"#app",
            data:{
                teachers:[
                    "东东",
                    "然然",
                    "涛涛",
                    "洋洋"
                ]
            }
        });
    </script>
    
</body>
</html>